GARbro-mirror/ArcFormats/ExHibit/ArcGRP.cs

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2017-04-07 16:40:52 +08:00
//! \file ArcGRP.cs
//! \date Thu Apr 06 16:41:59 2017
//! \brief ExHIBIT audio resource archive.
//
// Copyright (C) 2017 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.Text;
using System.Text.RegularExpressions;
namespace GameRes.Formats.ExHibit
{
[Export(typeof(ArchiveFormat))]
public class GrpOpener : ArchiveFormat
{
public override string Tag { get { return "GRP/EXHIBIT"; } }
public override string Description { get { return "ExHIBIT engine audio resource archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
static readonly Regex s_ResNameRe = new Regex (@"res(\d+)\.grp$", RegexOptions.IgnoreCase);
public override ArcFile TryOpen (ArcView file)
{
var match = s_ResNameRe.Match (file.Name);
if (!match.Success || file.View.AsciiEqual (0, "AiFS"))
return null;
var digits = match.Groups[1];
int arc_num = UInt16.Parse (digits.Value);
int toc_num = arc_num - 1;
int arc_index = 1; // number by which archive is referenced within toc file
// look for toc file
ArcView toc_file = null;
var toc_name_sb = new StringBuilder (file.Name.Length);
while (toc_num >= 0)
{
toc_name_sb.Clear();
toc_name_sb.Append (file.Name);
toc_name_sb.Remove (digits.Index, digits.Length);
toc_name_sb.Insert (digits.Index, toc_num.ToString ("D4"));
var toc_name = toc_name_sb.ToString();
if (!VFS.FileExists (toc_name))
return null;
toc_file = VFS.OpenView (toc_name);
if (toc_file.View.AsciiEqual (0, "AiFS"))
break;
toc_file.Dispose();
toc_file = null;
toc_num--;
arc_index++;
}
if (null == toc_file)
return null;
using (toc_file)
{
int res_count = toc_file.View.ReadInt32 (0xC);
if (res_count < arc_index)
return null;
uint index_offset = 0x10;
// find archive reference within toc file
bool arc_found = false;
for (int i = 0; i < res_count && index_offset < toc_file.MaxOffset; ++i)
{
if (toc_file.View.ReadInt32 (index_offset) == arc_index)
{
arc_found = true;
break;
}
uint entries = toc_file.View.ReadUInt32 (index_offset+0xC);
index_offset += 0x10 + entries * 8;
}
if (!arc_found)
return null;
int count = toc_file.View.ReadInt32 (index_offset+0xC);
if (!IsSaneCount (count))
return null;
int start_index = toc_file.View.ReadInt32 (index_offset+4);
index_offset += 0x10;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
uint offset = toc_file.View.ReadUInt32 (index_offset);
uint size = toc_file.View.ReadUInt32 (index_offset+4);
if (size != 0)
{
var entry = new Entry {
Name = string.Format ("{0:D5}.ogg", start_index+i),
Type = "audio",
Offset = offset,
Size = size,
};
entry.Offset = toc_file.View.ReadUInt32 (index_offset);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
index_offset += 8;
}
if (0 == dir.Count)
return null;
return new ArcFile (file, this, dir);
}
}
}
}